I am looking into buying an SKS (tommorow) and I have a thought. That thought would be to buy one decent one with a nice stock, ect and keep it as is. Then further down the road, buy another one and turn it into a "Tactical" looking rifle by putting a synthetic stock and a optical sight on it. Now, as you can tell by my name, I am into milsurps and do not want to ruin a milsurp by drilling for a mount. So I had a boo at Marstars website and they have a No gunsmith mount that replaces the rear sight. How are these? I read the part about scoping the SKS on one of the stickies and it said that they have to be removed to remove the gas tube. Anyone have any experience with them?